Hi all,
Something strange occurred.
I have ceph 0.87 version and 2048gb image format 1. I decided to made incremental backups between clusters
i've made initial copy,
time bbcp -x 7M -P 3600 -w 32M -s 6 -Z 5030:5035 -N io "rbd export-diff --cluster cluster1 --pool RBD-01 --image CEPH_006__000001__NA__0003__ESX__ALL_EXT --snap move2db24-20150428 -" 1.1.1.1:"rbd import-diff - --cluster cluster2 --pool TST-INT-SD-RBD-1DC --image temp
and decide to move incremental(it should be about 200-600gb of changes)
time bbcp -c -x 7M -P 3600 -w 32M -s 6 -Z 5030:5035 -N io "rbd --cluster cluster1 --pool RBD-01 --image CEPH_006__000001__NA__0003__ESX__ALL_EXT --from-snap move2db24-20150428 --snap 2015-05-05 -" 1.1.1.1:"rbd import-diff - --cluster cluster2 --pool TST-INT-SD-RBD-1DC --image temp"
it itakes about 30min(it was too fast because i have limitation 7M bettween clusters) and i decided to check how much data was transfered
time rbd export-diff --cluster cluster1 --pool RBD-01 --image CEPH_006__000001__NA__0003__ESX__ALL_EXT --from-snap move2db24-20150428 --snap 2015-05-05 -|wc -c
4753 Exporting image: 100% complete...done.
i've double checked it.. it was really 4753 bytes, i've decided to check export-diff file
0000000: 7262 6420 6469 6666 2076 310a 6612 0000 rbd diff v1.f... 0000010: 006d 6f76 6532 6462 3234 2d32 3031 3530 .move2db24-20150 0000020: 3432 3874 0a00 0000 3230 3135 2d30 352d 428t....2015-05- 0000030: 3035 7300 0000 0000 0200 0077 0080 5501 05s........w..U. 0000040: 0000 0000 0002 0000 0000 0000 02ef cdab ................ 0000050: 0080 3500 0000 0000 0d00 0000 0000 0000 ..5............. 0000060: 2d58 3aff 5002 0000 bc56 2255 08fc 14a9 -X:.P....V"U.... 0000070: e6c0 e839 351a 942c 01de 4603 0e00 0000 ...95..,..F..... 0000080: 3a00 0000 0000 0000 0000 0000 0000 0000 :............... 0000090: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ ...... 0001270: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0001280: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 0001290: 65 e
it look like correct format..
i've made clone(like flex clone) from snapshot 2015-05-05 & found that it doesn't have changes from snap move2db24-20150428
Do you have any ideas, what should i check? why is it hapend?
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